Vehicle intelligent power distribution system, power distribution control method and medium

Abstract

The invention belongs to the technical field of vehicle low-voltage power distribution systems, and provides a vehicle intelligent power distribution system, a power distribution control method and a medium, the vehicle intelligent power distribution system is connected with a plurality of loads on a vehicle, and comprises a power distribution control module which is connected with a monitoring platform and a battery; the power distribution control module is configured to take the power tube as an output switch to output power to the load, detect the working current of each load in real time, and adjust the working current flowing to the corresponding load by changing the output opening degree of the power tube when the working current of any load is abnormal; when the working current exceeds a preset threshold value, it is determined that the working current is abnormal; the preset threshold value is determined based on historical current data output to the load by the system and a hardware overcurrent protection maximum value. The method has the advantages that the platform is adopted to analyze historical output current data, and equipment abnormity caused by current abnormity is judged in advance, so that intelligent remote diagnosis and protection functions are better achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle low-voltage power distribution systems, and in particular to a vehicle intelligent power distribution system, a power distribution control method and a medium. Background Art

[0002] The low-voltage electrical system of an automobile is the power system required for all electrical equipment and electronic devices in the vehicle except the high-voltage system. It consists of batteries, electrical loads, and electrical control systems, etc., and provides auxiliary power for the vehicle to ensure its normal operation.

[0003] The low-voltage electrical system includes an insulation system, a power distribution system and a control system. The power distribution system is used to convert the direct current output by the high-voltage battery into alternating current suitable for low-voltage equipment, thereby supplying power to various low-voltage electrical equipment.

[0004] The low-voltage power distribution system of an automobile is generally composed of low-voltage fuses and relays to realize the power distribution function of the output circuit. However, due to defects such as the low protection timeliness of the fuse and the inability of the relay to switch at a high frequency, the reliability of the circuit cannot be improved. Summary of the invention

[0005] The object of the present invention is to provide a vehicle intelligent power distribution system, a power distribution control method and a medium to solve the above-mentioned problems.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: A vehicle intelligent power distribution system is connected to multiple loads on the vehicle, including a power distribution control module, which is respectively connected to a monitoring platform and a battery. The power distribution control module is configured to output power to the load using a power tube as an output switch, and detect the working current of each load in real time. When the working current of any load is abnormal, the working current flowing to the corresponding load is adjusted by changing the output opening of the power tube; When the working current exceeds a preset threshold, it is determined that the working current is abnormal; the preset threshold is determined based on historical current data output by the system to the load and the maximum value of the hardware overcurrent protection.

[0007] Furthermore, the specific steps of determining the preset threshold include: taking the maximum value of the hardware overcurrent protection as the upper limit, dividing the current into multiple intervals according to the current value, determining the interval with the largest amount of data based on the historical current data, and determining the threshold according to the serial number of the corresponding interval.

[0008] Furthermore, the preset threshold is stored in the monitoring platform.

[0009] Furthermore, the preset threshold is updated in real time according to the historical current data sampled in time-sharing manner.

[0010] The present invention also provides a vehicle power distribution control method, which is based on the above-mentioned vehicle intelligent power distribution system and includes the following steps: After the vehicle is powered on and in a drivable state, the output opening of the power tube is adjusted to the maximum to output power to the load; The working current of each load is read in real time. When the working current exceeds the preset threshold, it is determined to be abnormal, and the working current flowing to the corresponding load is adjusted by changing the output opening of the power tube.

[0011] Furthermore, the specific steps of determining the threshold value include: taking the maximum value of the hardware overcurrent protection as the upper limit, dividing the current value into multiple intervals, determining the interval with the largest amount of data based on historical current data, and determining the threshold value according to the sequence number of the corresponding interval.

[0012] Furthermore, timing is performed when the working current exceeds a preset threshold value, so as to determine whether the working current is abnormal according to the timing duration.

[0013] Furthermore, the method further includes the following steps: when the working current read in real time after changing the output opening of the power tube always exceeds the preset threshold, closing the output opening of the power tube to cut off the power supply to the corresponding load.

[0014] Furthermore, after the power supply to the load is cut off, the fault information of the load is sent to the monitoring platform for storage.

[0015] The present invention also provides a computer-readable storage medium, on which instructions are stored. When the instructions are run on a computer, the above-mentioned vehicle power distribution control method is executed.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: (1) Each output of the power distribution system adopts a power tube mode and is equipped with a current detection function. Through real-time detection of voltage and current, when abnormal current occurs, the output port adjusts the load output through software. This method has good protection timeliness and high detection accuracy; (2) In order to better discover problems during equipment use in advance, the platform uses analysis of historical output current data to determine equipment abnormalities caused by abnormal current in advance, thereby better achieving intelligent remote diagnosis and protection functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the framework of the vehicle intelligent power distribution system in the embodiment provided by the present invention; Figure 2 It is a flow chart of the steps of the power distribution control method in the embodiment provided by the present invention. DETAILED DESCRIPTION

[0019] It should be noted that in the present invention, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0020] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0022] The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.

[0023] like Figure 1 As shown, this embodiment provides a vehicle intelligent power distribution system, which is connected to multiple low-voltage loads on the vehicle, so as to distribute the power of the battery to the low-voltage loads. The intelligent power distribution system includes a power distribution control module, which is connected to the low-voltage battery and the high-voltage battery through a power conversion circuit, and is connected to a remote terminal through a communication bus, and the remote terminal is connected to a monitoring platform through a network.

[0024] The power distribution control module is equipped with a power tube, and uses the power tube as an output switch to output power to the load, thereby replacing the previous power distribution circuit that uses relays as output switches.

[0025] At the same time, the power distribution control module is configured to detect the working current of each load in real time. When the working current of any load is abnormal, the working current flowing to the corresponding load is adjusted by changing the output opening of the power tube.

[0026] Each output of the power distribution system is equipped with a current detection function. Through real-time detection, when abnormal current occurs, the output opening of the power tube can be controlled by software to achieve the function of adjusting the load output at the output port. This method has good timeliness and high detection accuracy.

[0027] In real-time detection of load current, the power distribution control module is configured to determine that the working current is abnormal when the working current exceeds a preset threshold value An. The preset threshold value is determined based on the historical current data output by the system to the load and the maximum value Hn of the hardware overcurrent protection.

[0028] Therefore, the preset threshold value An is determined in the monitoring platform, and the specific process is as follows: First, the monitoring platform takes the maximum value Hn of the hardware overcurrent protection as the upper limit and divides it into 11 intervals according to the current value during use, namely 0, (0, 10% Hn], (10% Hn, 20% Hn], ..., (90% Hn, Hn].

[0029] Then, the working current data uploaded to the monitoring platform according to the time-sharing sampling is classified and counted according to the above intervals, and the statistical data of each interval is determined in turn as L0, L1, ..., L10.

[0030] The preset threshold is determined by selecting the maximum value in the statistical data and according to the interval number corresponding to the maximum value according to the following formula: An=Hn*X*10%; Where X is the interval number corresponding to the maximum value of the statistical data.

[0031] And during the operation of the vehicle power distribution system, the preset threshold can be self-learned according to the historical current data sampled in time, so as to achieve real-time update, so as to determine the equipment abnormalities caused by abnormal current in advance, and better achieve intelligent remote diagnosis and protection functions.

[0032] like Figure 2 As shown, in this embodiment, a vehicle power distribution control method is also provided, based on the above-mentioned vehicle intelligent power distribution system, which includes the steps of: S1. After the vehicle is powered on and in a drivable state, the output opening of the power tube is adjusted to the maximum to output power to the load; S2. Read the working current of each load in real time. When the working current exceeds a preset threshold, it is determined that the working current is abnormal, and the working current flowing to the corresponding load is adjusted by changing the output opening of the power tube.

[0033] Among them, the working current of the nth load is In, the voltage is Vn, and the output state of the power tube is Sn. It adopts PWM wave control method. When Sn=100%, it is fully open, and when Sn=0, it is closed. When the current detection value exceeds the preset threshold, Wn=1; otherwise, Wn=0.

[0034] Therefore, when it is detected that the load operating current In>1.2*An, it is determined that the load operating current is abnormal, and the output state Sn of the power tube needs to be changed to a closed state.

[0035] In another preferred embodiment, when it is determined that the working current of the load is abnormal, the output opening of the power tube is first reduced and continued for a certain period of time, that is, it is operated in the power mode. After the time is over, the current working current of the load is re-detected. If it still exceeds the preset threshold, the output state of the power tube is closed to cut off the power supply to the corresponding load.

[0036] At the same time, after the power supply to the load is cut off, the fault information of the load is sent to the monitoring platform for storage.

[0037] In another preferred embodiment, timing is performed while the working current exceeds a preset threshold value to determine whether the working current is abnormal based on the timing duration. That is, timing is started when it is detected that the load working current In>1.2*An. If the working current continues to exceed the preset threshold value for a certain period of time, it is determined that the load working current is in an abnormal state.

[0038] Each output of the power distribution system adopts a power tube mode and is equipped with a current detection function. Through real-time detection of voltage and current, when abnormal current occurs, the output port adjusts the load output through software. This type of protection has good timeliness and high detection accuracy.

[0039] At the same time, the platform analyzes historical output current data to determine equipment abnormalities caused by abnormal current in advance, so as to better achieve intelligent remote diagnosis and protection functions.

[0040] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A vehicle intelligent power distribution system, which is connected to multiple loads on the vehicle, characterized in that: The power distribution control module includes a power distribution control module, which is connected to the monitoring platform and the battery respectively. The power distribution control module is configured to use the power tube as an output switch to output power to the load, and detect the working current of each load in real time. When the working current of any load is abnormal, the output opening of the power tube is changed to adjust the working current flowing to the corresponding load; When the working current exceeds a preset threshold, it is determined that the working current is abnormal; The preset threshold is determined based on historical current data output by the system to the load and a maximum value of hardware overcurrent protection; The specific steps of determining the preset threshold include: The maximum value of the hardware overcurrent protection is used as the upper limit, and the current value is divided into multiple intervals. The interval with the largest amount of data is determined based on the historical current data, so as to determine the threshold value according to the sequence number of the corresponding interval.

2. A vehicle intelligent power distribution system according to claim 1, characterized in that: The preset threshold is stored in the monitoring platform.

3. The vehicle intelligent power distribution system according to claim 1, characterized in that: The preset threshold is updated in real time according to the historical current data sampled in time-sharing manner.

4. A vehicle power distribution control method, based on the vehicle intelligent power distribution system according to claim 1, characterized in that: Includes steps: After the vehicle is powered on and in a drivable state, the output opening of the power tube is adjusted to the maximum to output power to the load; The working current of each load is read in real time. When the working current exceeds a preset threshold, it is determined that the working current is abnormal, and the working current flowing to the corresponding load is adjusted by changing the output opening of the power tube.

5. A vehicle power distribution control method according to claim 4, characterized in that: The specific steps of determining the threshold value include: The maximum value of the hardware overcurrent protection is used as the upper limit, and the current value is divided into multiple intervals. The interval with the largest amount of data is determined based on the historical current data, so as to determine the threshold value according to the sequence number of the corresponding interval.

6. A vehicle power distribution control method according to claim 4, characterized in that: When the working current exceeds a preset threshold, timing is performed to determine whether the working current is abnormal according to the timing duration.

7. A vehicle power distribution control method according to claim 4, characterized in that: The method further includes the following steps: when the working current read in real time after changing the output opening of the power tube always exceeds the preset threshold, closing the output opening of the power tube to cut off the power supply to the corresponding load.

8. A vehicle power distribution control method according to claim 7, characterized in that: After cutting off the power supply to the load, the fault information of the load is sent to the monitoring platform for storage.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores instructions, and when the instructions are executed on a computer, the vehicle power distribution control method according to any one of claims 4 to 8 is executed.

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